Here is the full list of all 12 Nuclear Mages achievements.
A new mage to fight the void.
Collected first void orb.
In the void numbers do not matter.
Find and defeat the easy dungeon boss.
Find and defeat the hard dungeon boss.
Find and defeat the insane dungeon boss.
Get out of bound and get teleported by the safety net.
Killed town folk.
Found a token and went into the temple of Lust.
Cleared 10 waves.
Have 100k gold.
Now that's rich, have 500k gold.